Across
- 4. this pigment stores oxygen in muscle tissue for aerobic respiration
- 6. these bands are anchored to the Z lines, made up of actin filaments
- 9. the enzyme that provides energy from ATP to ADP to the cross-bridges
- 11. Reticulum a network of membranous channels beneath the sarcolemma of a muscle fiber
- 12. in the sliding model of muscle contraction, this is formed when a myosin head attaches to a binding site on the actin filament
- 13. myofibrils are made up of many units of these
- 15. broad sheets of connective tissue that can connect muscles to each other
- 17. proteins in thick filaments of myofibrils
- 19. proteins in thin filaments of myofibrils
- 20. first phase of cellular respiration, occurs in the cytoplasm
- 21. extends inward from epimysium, surrounds bundles of skeletal muscle fibers
- 24. the cytoplasm of a muscle cell
- 25. this junction is a synapse between a motor neuron and a muscle fiber that it regulates
- 26. these tubules are invaginations of the sarcolemma
- 27. these bands are made up of overlapping thick and thin filaments
- 28. center of the H zone, consists of proteins that hold the myosin filaments in place
- 29. fused to the periosteum of bones
Down
- 1. dense connective tissue layers that surround and separate muscles
- 2. this carries oxygen to muscle tissue in red blood cells
- 3. bundles of skeletal muscle fibers inside perimysium
- 5. the cell membrane of a muscle fiber
- 7. allows neurons to communicate with the muscle fiber
- 8. parallel, contained in sarcoplasm, active in muscle contraction
- 10. a type of respiration that completely breaks down glucose, requires oxygen, and occurs in the mitochondria
- 14. neurotransmitter for skeletal muscle fiber contraction at the neuromuscular junctions
- 16. layer of connective tissue around each skeletal muscle
- 18. these neurons stimulate skeletal muscle fibers to contract
- 22. the organization of thick and thin filaments produces these bands
- 23. zone in center of the A band, consists of myosin filaments only